Lenovo 64635BU Troubleshooting Guide - Page 25
Message, Solution, Exit Saving Changes, Restart
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Solving computer problems Message Solution 0250: System battery error The backup battery, which is used to preserve the configuration information, such as the date and time, while the computer is turned off, is depleted. Replace the battery and run BIOS Setup Utility to verify the configuration. If you still have a problem, have the computer serviced. 0251: System CMOS checksum bad The system CMOS might have been corrupted by an application program. The computer uses the default settings. Run BIOS Setup Utility to reconfigure the settings. If you still see the same error code, have the computer serviced. 0271: Date and time Neither the date nor the time is set in the computer. Set the error date and time, using the BIOS Setup Utility. 0280: Previous boot Your computer was previously unable to complete the boot incomplete process. Turn the computer off; then turn it on to start the BIOS Setup Utility. Verify the configuration and then restart the computer either by choosing the Exit Saving Changes option under the Restart item or by pressing F10. If you still see the same error code, have the computer serviced. 1802: Unauthorized network card is plugged in - Power off and remove the miniPCI network card. The Mini-PCI network card is not supported on this computer. Remove it. 1803: Unauthorized daughter card is plugged in - Power off and remove the daughter card. The daughter card is not supported on this computer. Remove it. 1804: Unauthorized WAN card is plugged in - Power off and remove the WAN card. The WAN card is not supported on this computer. Remove it. 1805: Unauthorized Wireless USB card is plugged in - Power off and remove the Wireless USB card. The Wireless USB card is not supported on this computer. Remove it. 2100: Initialization error on HDD0 (Main hard disk drive) The hard disk is not working. Have the hard disk serviced. Chapter 3. Solving computer problems 15